Drill press



P.-H. LECKINGER.

DRILL PRESS. APPLICATION FILED JULY 3.1919.

Pawmedl (M. 45192.

2 SHEETSSHEET 1.

P. H. LECKINGER.

DRILL PRESS. APPLICATION FILED JULY 3.1919.

' Patented 00h M, 1922.

2 SHEETSSHEET 2.

' IN VEN TOR.

Patented ct. 24, 19.

PHILIP H. LECKLNGER, OF ROCHESTER,

NEW YORK, AssrsNoE TO HIGH sPEED MAMMEE ooMrANY, we, or ROCHESTER, NEWYORK, A cOnrOEA'MoN OF NEW EOEE.

DRILL PRESS.

Application filed July 3,

To all whom it may concern Be it known that ll,lPH1LIP H.LE0K1NGER, acitizen of the United States, and resident of Rochester, in the countyof Monroe and State of New York,have invented certain new and usefulImprovements in Drill Presses, of which the following is aspecification.

The present invention relates to drill pressesand an object thereof isto provide a strong and compact structure of light weight which may bemounted upon a work bench. Another object of the invention is to providean. improved drill press which may be operated by hand or foot powerStill another object of the invention is to provide a frame which willsupport an electric motor thereon in such a manner that the drivingconnection between the motor and tool spindle is of the simplestconstruction. Still another object of the invention is to provide forprotecting the guide surface on which the work table is adjustable. Afurther object of the invention is to provide a guard for the toolcarrying spindle and its driving pulley. A still further object of theinvention is to provide a depth gage of simple construction.

To these and other ends the invention con- .sists of certain parts andcombinations of parts all of. which will be hereinafter described, thenovel features being pointed out in the appended claims.

In the drawings Fig. 1 is a View in central vertical section through amachine embodying the present invention, parts of the machine beingshown in side elevation;

Fig. 2 is a section on the line 22,- Fig. 1;

Fig. 3 is a section on the line 3-3, Fig. 1; Fig. 4 is a section on theline 4-4, Fig. 1; and

Fig. 5 is a detail View of the spindle lock.

Referring particularly to the embodiment of the invention herein shown,1 indicates a cast base frame formed with a planed surface 2 to providea work support and with a groove or channel 3 on three sides of saidplaned surface 2 to act as an oil trap. To one side of the planedsurface 2 the base 1s provided with an upstanding or projecting socket 4in which the lower end of a guide and supporting frame 5 is fitted. Thissocket projects above-the planed surface 2 and has its upper endbevelled at 4*.

1919. Serial No. 308,442.

The guide and supporting frame has at its upper end two arms 6 and 7spaced apart and connected by a sleeve 8, said sleeve be ing mounted atits upper and lower end in two ball bearings 9 arranged in pockets, oneof which opens at the top of the arm 6 and the other of which opens atthe bottom of the arm 7, two sore-w disks 10 being employed for closingsaid pockets and holding said bearings therein while at the same timeacting to sustain the sleeve 8 against axial or longitudinal movement. Aspindle 11 is secured to the sleeve 8 so as to turn therewith while atthe same time said spindle is adapted forlongitudinalmovement in thesleeve, the opposite ends of the spindle projecting from the oppositeends of the sleeve. 0n the lower projecting end of the spindle atoolchuck or holder 12 is mounted While the upper end of the spindle isjournaled in a laterally extending arm 13 on a vertically movable frameor. slide 14 which operates Within the supporting frame, a thrustbearing 15 being interposed betweena. shoulder on the spindle 11 and thearm 13 of the slide 14.

The vertical adjustment of the slide 14 may be obtained by providing thesupport-v ing frame with a vertically extending bore or opening 16 inwhich the vertical portion of the slide 14 operates. In this bore 16below the lower end of the slide 14 a helical spring 17 may be arranged,the lower end of th1s spring seating at 18 while the upper end abuts thelower end of the slide 14.

This spring tends normally to elevate the the helical spring 17 at itsupper end and has screw threaded engagement at 19 with the wall of thescrew threaded opening in the lower end of the slide. The lever movementof the slide may be effected by a lever 20 which extends laterally fromthe projecting end 21 of ashaft journaled in a bore or opening 22, thisbore 22 extending horizontally and intersectin the opening 16. The shaftat the intersectlng portion is provided with a gear 23 which meshes witha rack 24 formed on the slide 14. It is apparent that the swinging ofthe lever arm 20 will turn the gear 23 and lower the slide 14 to feedthe chuck 12. This feeding movement may also be effected as beforementioned through the rod 13. In both instances the spring 17 will becompressed and will tend to elevate the slide and chuck when the slide11 is released.

The work may be supported beneath the chuck either upon the planedsurface 2 on the base frame or upon a planed surface 25 on a table 26which projects froma split sleeve 27 operating upon a. cylindricallyformed guide surface 28 on the supporting frame 5. The upper end of thesleeve 27 projects above the planed surface 25 and is bevelled at 29.the purpose of this construc. tion is to prevent work supported on thetable being moved against the guide surface 28 and injuring the latter.The bevelled upper end of the sleeve or collar 2? acts to shed anyfilings which may fall upon the upper end of the sleeve or collar. Thisresult is also present in the socket at and its bevelled end withreference to the planed surface 2. A screw 30 connects the two portionsof the sleeve or collar on opposite sides of the slide in order to drawthe collar or sleeve in firm engagement with the cylindrically formedguide 28.

Turning of the chuck may be effected by an electric motor 31 which ispreferably supported with its shaft uprightupon a hollow support 32resting upon an extension 33 of the base. A shaft 31 is secured to themotor .shaft and is mounted in the self-aligning ball bearings 35 in anarm 36 which projects from the rear side of the supporting frame 5.About this arm the shaft 31 is provided with two pulleys 37 and 38 abouteither of which a belt 39 is adapted to be passed. said belt alsopassing about the pulleys 10 and -11 which are secured to the sleeve 3between the arms 6 and T of the supporting frame. A set screw =12 passesthrough the pulley 41 to secure the latter to the sleeve 8 and to engagewithin a. longitudinally extending groove in the spindle 11 so as topermit the spindle to be moved longitudinally in the sleeve while at thesame time causing the pulleys -10 and 11 with thesleeve 8 to turn withthe shaft 11.

For the belt- 39 there may be provided a tightener in the form of anidle pulley 13 mounted on a spindle 11 which projects upwardly from anarm 45 that is mounted to swing on the arm- 36 of the supporting frame5. This swinging of the arm may be obtained by a bolt 46 extendinthrough the arm 45 and a perforated pro ection 17 on the supportingframe. a thumb nut 13 being arranged on the lower end of the bolt 16 f0rthe purpose of securing the arm 4:5 in its ad usted position. For thepurpose of protecting the user of the machine against injury from theexposed parts of the spindle 11 there may be provided a guard -19 whichis secured to the free end of the arm 6 by a screw bolt 50 and has aportion 51 project-- ing upwardly above the arm 6 about the spindle 11and a portion 52 projecting downwardly from the arm 6 about the pulleys10 and 11. the downwardly projecting portion being spaced from the arm 7so that the belt 39 may be readily removed.

The machine may also be provided with a depth gage which in thisinstance comprises a rod 53 slidably mounted on the arm 13 of the slide11 and having at its lower end a cap 51 screw threaded thereon. said capbe ing held in its adjusted position by a clamp nut 55. This cap 54 isadapted to cooperate with the planed upper face of the projection 56which extends upwardly from the arm 6 below the arm 13 of the slide 14.Rough adjustment of this depth gage is secured by releasing the sliderod 53 by means of the set screw 57 which is afterwards employed forclamping the slide rod 53 in ad justed position. Fine adjustment isobtained by turning the screw cap 5-1 on the rod 53 and securing the capin its adjusted position by the nut 55.

The machine may also be provided with a spindle lock for holding thespindle against turning while the chuck is being adjusted to fit toolsto or to remove such tools. This spindle lock comprises in this instancea lever 58 pivoted at 59 to the arm 7 and having an operating portion 60by which the locking portion 61 may be moved into and out of connectionwith the locking collar or ring 62 formed on the spindle. This lockingcollar or ring 62 is situated directly above the chuck 12 and is adaptedwhen the spindle is moved to its uppermost position to be broughtopposite the locking end 61 of the lever 58 so that said locking end 61may enter a notch or groove 63 formed in the collar 62. thus holding thespindle against turning so that the chuck may be manipulated to insertor remove a tool without the hands of the operator being required tohold the spindle against turning.

The operation of the machine will be apparent. The tool being arrangedwithin the chuck 12. either one of two speeds may be obtained byshifting the belt 39 on the pulleys 37. 38. -10 and 41. The work ismounted either upon the planed surface 2 on the base or the planedsurface 25 on the table 26. the table 26 being shifted out of the waywhen the base surface 2 is to be used as a work support. The chuck 12with tool is moved toward the work through the hand lever 20 or througha treadle connected with the rod 19.

A drill press constructed in accordance with this invention is adaptedto be arranged upon the ordinary work bench to be operated means? til byhand or foot power. The supporting frame provides a light and durablestructure and the motor is supported on the base frame and connected tothe tool carrying spindle by driving connection of the Simplest form. Aguard is provided which protects the driving pulley of the tool carryingspindle and at the same time offers a protection against the toolcarrying spindle. The depth .gage is of simple construction and is somounted as not to interfere with the operation of the machine.

What I claim as my invention and desire to secure by Letters Patent is:

1. A drill press comprising a base frame, a supporting frame havin anupright guiding portion rising from the base frame and ha-vin also twoarms projecting from one side t ereof, and one arm projecting fromtheopposite side thereof, a sleeve journaled in the two arms, a pulleyon the sleeve between the two arms, a tool carrying spindle mounted toturn with the sleeve and to tltl move axially therein, a verticallyarranged shaft supported on the other arm of the supporting frame, apulley arranged on the shaft and having a drivlng connection with thepulley on the sleeve, a slide mounted on the supporting frame andconnected with the spindle, and a table adjustable onthe upright guideportion of the supporting frame.

2. A drill press comprising a base frame, a supporting frame having ahollow guide portion rising from the base frame and provided with twoarms, one projecting from one side thereof, and *the other armprojecting from the opposite side thereof, an upright shaft journaled inthe last mentioned arm, a sleeve journaled in the first two named arms,driving connection between the shaft and the sleeve, a slide movable inthe hollow guide portion provided at its upper end with an arm, a toolcarrying spindle carried by said arm and movable axially in the sleeve,said spindle being journaled on the arm and being connected with thesleeve to turn with the latter, and a table adjustable on the guideportion of the supporting frame.

3. A drill press comprising a base having a motor supporting portion anda work supporting portion, a supporting frame rising from the basebetween said motor supporting portion and work supporting portion anprovided with three arms, two on one side thereof and one on theopposite side, a motor supported on the motor supporting portion of thebase frame and having an upright shaft mounted in one of the arms, aself-aligning bearing for said upright motor shaft, a sleeve mounted toturn in the other two arms of the supporting frame, driving connectionbetween the motor shaft and the sleeve, a vertically movable slide onthe supporting frame, and a spindle journaled on said slide and adaptedto move vertically therewith, said spindle operating axially withinthesleeve but being connected to the sleeve to turn with the latter. I

4:. A drill press comprising a base frame having a work supportingportion and a motor supporting portion, a supporting frame having ahollow guide portion rising from the base frame between the worksupporting portion and the motor supporting portion,'said supportingframe having one arm projecting from one side' thereof over the motorsupporting portion and two arms projecting from the opposite sidesthereof over the work supporting portion, a motor supported on the motorsupporting portion, a shaft connected to said motor and extendingvertically through the arm over the motor supporting portion of the baseframe, a hollow sleeve journaled in the two arms over the worksupporting portion, driving connection between the motor shaft and thesleeve, a slide operatingin the hollow guide portion of the supportingframe and provided with an arm at its upper end, a tool carrying spindlejournaled in said arm and operating axially through the sleeve butconnected to the sleeve to turn therewith, and a table mounted on thevertical guide portion of the supporting frame.

5. A drill press comprisin a supporting frame having two arms one a ovethe other, the upper one of which is provided with a pocket in its topside and the lower one of which is provided with a pocket on its underside, a sleeve turning in the arms, bearings for the sleeve arranged inthe pockets, discs closing said pockets and holding the bearingstherein, said discs. also cooperating with the sleeve to hold the latterto its bearings, a tool spindle turning with the sleeve and movableaxially therein, and a driving member connected to the sleeve betweenthe arms.

PHILIP H. LECKINGER.

